Diamond Glossary

Dahlia shape cut, oval with flat ends. The Dahlia Cut has in total 51 facets, 37 facets on the crown, 14 facets on the pavilion and was 'invented' for De Beers in the 90's by Antwerp cutter Gabi Tolkowsky.

The diamond is a rare crystal of native carbon [C atomic number 6 - an abundant nonmetallic tetravalent element] in isometric crystals, often (hex)octahedrons with rounded edges. Discovered to be carbon in 1796, the diamond is usually almost colorless, but some diamonds are yellow, green, blue, and even
black. These colors are caused by impurities by other minerals, ie. nitrogen ... yellow, boron ... blue, crystal irregularities ... pinks, browns and reds. It is the hardest (Mohs scale 10) mineral known, yet it can be crushed or broken. The diamond
as found in nature (called a rough diamond) is cut and polished for
use in jewelry into various forms with many reflecting
faces, or facets, by which its brilliancy is much
increased. The 58 facet round cut diamond is called brilliant; it is the most reflective and usual cut for diamond jewellery like in Barninka custom made solitaire diamond engagement rings.
Details: high thermal conductivity of 5-25 Watts/centimeter-°C ; Knoop hardness nr. 56-115; refractive index: 2.4175 sodium yellow light ; density: 3.51 g/cm3 ; [Middle English diamaunt, from Old French diamant, from Medieval Latin diamas, diamant- alteration of Latin adamas; bible adamant.]